Looks like Blue Ivy Carter is adjusting just fine to having two new babies in the family!

Formerly one of the most famous celeb children EVER right up until momma Beyoncégave birth to twins this summer, Blue Ivy is now one of three most famous celeb children, alongside Sir Carter and Rumi Carter.

According to a source close to Bey and JAY-Z, Blue Ivy has really taken to helping her momma care for the babies, and she hasn't hesitate to dote on her infant siblings:

"Blue is the best big sister. [She] helps Beyoncé every day."

So adorable!

Blue is just five years old, of course — but we're sure she's helping out as much as she can, and even more than that, there's no doubt she's creating a very, very close bond with those two adorable babies!

We couldn't be happier!

The source adds:

"Everyone is doing great. They are still enjoying the summer in Malibu. Blue is excited to be back in school soon. The babies are growing and very cute."

As we previously reported, Britney Spears' baby daddy has requested an increase in his $20K a month child support stipend. While it's said that Godney isn't THRILLED at the request, she's letting her poppa negotiate a deal with KFed.

And it appears that negotiations are well under way, though Mr. Spears is NOT impressed with his former son-in-law!